Floor-scraping machine



Oct. 23, 1928.

J. T. SIMPSON FLoor; SCRAPING MACHINE H F iled July 20, 1927 Fig.1,

JafiesT 51mpson Fig. 2-

INVENTOR,

0W. 1; mm

A TTORNEY.

Patented Got. 2?, i928.

was:

JAMES THOMAS SIMPSON, OF MACON, GEORGIA.

FLOOR-SCRAPING- MACHINE.

Application filed July 20, 1927. Serial No. 207,182.

This invention relates to a new and useful improvement in floorsurfacing devices.

The main object of the present invention to produce a machine which willgive a smooth-cut surface rather than a scraped or rasped surface suchas produced by a machine using the usual scrapers, rasps or sand paper.

Another object of the invention is to produce a machine which willdeliver the shavings, etc., at one side of the machine rather than leavethem scattered over the floor.

In the drawings:

Figure 1 is a side view of the machine with the near side of the caseremoved.

Figure 2 is a top view with the guard 7 turned back to show the cuttingdrum.

Figure 3 is a sectional view of the cuttingblade taken longitudinally ofthe drum 6.

The machine consists of the usual framework or housing 1 mounted onwheels 8 which run on the tracks 9, on which the device is propelled byhand. On top of the housing 1 is mounted the motor 2 controlled by theswitch 4, and which drives the cutterdrum 6 through any appropriatedriving means, such as a belt 5. The cutter-drum is carried by suitablebearings in the member 1 and is protected by the guard member 7.

The most important feature of the invention is the cutting-blade itself,which is shown in detail in Figure 3, in which 10 indicates the body ofthe drum 6, 12 indicates the cutting-blade. 11 indicates the cap-plate,and 13 indicates the screw holding the blade and cap to the drum. Thefillet beneath the blade may be either a separate member or may beturned directly on the drum 10 itself. There may be from one to fourblades, each encircling the drum at least once and extending" from oneend of the drum to the other like screw-threads. In the preferred formof the device, as illustrated, one blade is used on a drum having adiameter of approximately six inches and a length of about twelveinches, and the blade is so arranged as to have a pitch of one andone-half inches longitudinally of the drum. i. e. it encircles the drumeight times. The blade itself is set at an angle of approximatelytwenty-two and one-half degrees to the axis f the drum measured on anyradial plane passing through the said axis, ano is made of number twentygauge spring steel one inch Wide constructed to follow the blade-mountaround the drum. The blade is held in position by the members 11 whichhave the same configuration and each are half the circumference of thedrum. The members 11 are held by the screws 1".

This form of the machine should be operated at a drum speed of threehundred revolutions per minute. If more blades are used, the speedshould be changed to correspond.

The machine should be moved at a rate of one and one-half inches foreach fifteen inches travel of the blade longitudinally of the drum,at aspeed of three hunderd revolutions per minute it should be moved aboutthirty feet per minute.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. A floor-surfacing device comprising a body adapted to be propelledalong a floor, a motor on said body, a cutter-drum mounted in said bodyin such relation thereto as to operate upon a floor over which thedevice is to be propelled, power-transmitting means connecting saidmotor and said drum whereby said motor drives said drum, a spiralcutting; blade on said drum set at a cuttingangle of approximatelytwenty-two and onehalf degrees therewith, and means securing said bladein said relation to said drum, said means comprising a, cap plate memberextending parallel on the exterior surface of the spiral cutting blade,a fillet member, said fillet member being substantially parallel to saidcap plate member and located on the interior surface of said cuttingblade, and a bolted means securing said cap plate member, spiral cuttingblade and fillet member together and as for the purpose set forth.

2. A. floor-surfacing device comprising a body adapted to be propelledalong a floor, a motor on said boc y, a cutter-drum mounted in said bodyin such relation thereto as to operate upon a floor over which thedevice is to be propelled, power-transmitting means connecting saidmotor and said drum whereby said motor drives said drum, a spiralcutting blade on said drum set at a cutting-angle of approximatelytwenty-two and ne-half degrees therewith and encircling said drum aplurality of times, and means securing said blade in said relation tosaid drum, said'means comprising a cap plate member extending parallelon the exterior surface of the spiral cutting blade, a fillet 5 member,said fillet member being substantially parallel to said cap plate memberand located on the interior surface of said outting blade, and a boltedmeans securing said cap plate member, spiral cutting blade and filletmember together and as for the purpose set forth.

In testimony whereof I have affixed my signature.

JAMES THOMAS SIMPSON.

